96 MOSQUITOES OF NOETH AMERICA 



neath; middle tarsi with white markings on the outer side as in the female. 

 Claw formula, 0.0-0-0.0. 



Length : Body about 3 mm. ; wing 3.8 mm. 



Genitalia (plate 3, fig. 16) : Side-pieces tapered, constricted beyond the 

 middle, excavated at tip for insertion of clasp-filament. Clasp-filament swollen 

 at the base, inflated outwardly, distorted and branched, inner branch angled, 

 slender beyond the base, bearing a row of setae, a leaf -like appendage and two 

 hairs at its origin, a small branch outwardly bearing a claw; apex rounded, 

 spinose. Harpes slender, incurved, revolute. Harpagones indistinguishable. 

 Basal appendages small, separated, bearing three setae. 



Larva, Stage IV (see figure of the entire larva, plate 46). — Head rounded, 

 hind angles roundedly prominent, forming a right angle between the posterior 

 edge of the occiput and lateral margin behind the antennae; no incision at base 

 of antennae; front margin roundedly arcuate. Antennae moderate, cylindrical, 

 slightly tapered, smooth, a single hair at terminal third; one long, two moderate, 

 two short terminal digits. Eye small, round. Both pairs of dorsal hairs and 

 ante-antennal hair single. Mental plate triangular, one stout terminal tooth and 

 nine on each side, uniform, subequal. Mandible quadrangular, convex without, 

 a slight basal spinulation; one pair of appendages before tip, one long, one 

 rudimentary; an outer row of cilia; a row of filaments beyond the cUia, six 

 long-furcate, two simple; dentition small, four teeth on a narrow process, a 

 thin tooth without and a smaller one at base ; a filament and five feathered hairs 

 within; interior lobe with short setae ; a few long setae at base. Maxilla elongate 

 hemispherical, bisected by a band-shaped suture, hairy and spined within; a 

 row of setae at tip. Palpus short, quadrate, with four small terminal digits. 

 Mouth-brushes moderate, normal. Thorax quadrangular, slightly rounded at 

 comers, fiattened, wider than long; hairs strongly developed, long. Abdo- 

 men slender, the segments subequal, moniliform; hairs abundant, very long, 

 the long lateral tufts multiple, diminishing posteriorly ; short tufts well devel- 

 oped, longer than width of body. Tracheal tubes moderately broad, band- 

 shaped, flexuous, narrow in seventh and eighth segments. Air-tube tapered- 

 conic, about four times as long as wide, without pecten; rather thickly covered 

 with moderate single hairs. Lateral comb of eighth segment of seven spines 

 in a single row; spine quadrangular, with pointed base, shaft produced into a 

 broad, flat process over half as long as the spine, fringed with fine spines. Anal 

 segment wider than long with a dorsal plate three-fourths inclosing the segment ; 

 dorsal tuft of long hairs ; a lateral tuft of three long hairs at the angle of the 

 plate ; a subventral tuft of three long hairs ; no ventral brush. Anal gills mod- 

 erate, broad, only two developed, the other two rudimentary. 



Pupa (plate 148, fig. 697). — Thoracic mass subpyriform, small, indented 

 behind the insertion of antennae ; a tuft of two hairs from near margin of eye 

 is bent twice at right angles ; respiratory trumpets small, cylindrical. Abdomen 

 rather long; a pair of fan-shaped dorsal tufts on first segment; a pair of long 

 subdorsal hairs at ends of second to fifth segments ; ample tufts on apical angles 

 of seventh and eighth segments. Anal paddles small, pointed. 



We quote the life history and habits from Professor J, B. Smith, who has had 

 this insect under special observation : 



" The most characteristic habit of the adult is its inability or disinclination 

 to bite and suck blood — of human beings at least. Mr. Brakeley has been in the 

 bogs and swamps where there must have been hundreds of them and never a 

 one has come to disturb him. He has even seen them about, among the pitcher 

 plants, apparently engaged in ovipositing, and they paid not the slightest 

 attention to him. Since the spring of 1901 hundreds of specimens have been 



